<!DOCTYPE html>
<html lang="zh-cn">

<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <style>
        /* 定义弹出提示样式 */
        
        .login-header {
            width: 100%;
            text-align: center;
            height: 30px;
            font-size: 24px;
            line-height: 33px;
        }
        /* 初始化样式 */
        
        ul,
        li,
        ol,
        dl,
        dt,
        dd,
        div,
        p,
        span,
        h1,
        h2,
        h3,
        h4,
        h5,
        h5,
        a {
            padding: 0px;
            margin: 0px;
        }
        /* 定义登录框的样式 */
        
        .login {
            /* display: none; */
            width: 512px;
            height: 280px;
            position: fixed;
            border: #ebebeb solid 1px;
            left: 50%;
            top: 50%;
            background: #fff;
            box-shadow: 0px 0px 20px #ddd;
            z-index: 9999;
            transform: translate(-50%, -50%);
        }
        /* 定义模态框头部 */
        
        .login-title {
            width: 100%;
            margin: 10px 0px 0px 0px;
            text-align: center;
            line-height: 40px;
            height: 40px;
            font-size: 18px;
            position: relative;
            cursor: move;
        }
        /* 让整体内容下降 */
        
        .login-input-content {
            margin-top: 20px;
        }
        
        .login-button {
            width: 50%;
            margin: 30px auto 0px auto;
            line-height: 40px;
            font-size: 14px;
            border: #ebebeb 1px solid;
            text-align: center;
        }
        
        .login-bg {
            /* display: none; */
            width: 100%;
            height: 100%;
            position: fixed;
            top: 0px;
            left: 0px;
            background: rgba(0, 0, 0, 0.3);
        }
        
        a {
            text-decoration: none;
            color: #000;
        }
        
        .login-button a {
            display: block;
        }
        
        .login-input input.list-input {
            float: left;
            line-height: 35px;
            height: 35px;
            width: 350px;
            border: #ebebeb 1px solid;
            text-indent: 5px;
        }
        
        .login-input {
            overflow: hidden;
            margin: 0px 0px 20px 0px;
        }
        
        .login-input label {
            float: left;
            width: 90px;
            padding-right: 10px;
            text-align: right;
            line-height: 35px;
            height: 35px;
            font-size: 14px;
        }
        
        .login-title span {
            position: absolute;
            font-size: 12px;
            right: -20px;
            top: -30px;
            background: #fff;
            border: #ebebeb solid 1px;
            width: 40px;
            height: 40px;
            border-radius: 20px;
        }
    </style>
</head>

<body>
    <script>
        window.addEventListener('load', () => {
            let header = document.querySelector('.login-header'); //获取提示按钮
            let close = document.querySelector('.close-login'); //获取关闭按钮
            let modal = document.querySelector('.login'); //获取模态框
            let bg = document.querySelector('#bg'); //获取背景
            let title = document.querySelector('#title'); //获取头部栏
            bg.style.display = 'none'
            modal.style.display = 'none';
            header.addEventListener('click', (e) => {
                e.target.style.display = 'none'; //点击后隐藏此按钮,隐藏a标签，因为是a触发的
                bg.style.display = 'block';
                modal.style.display = 'block'
            });
            close.addEventListener('click', (e) => {
                // header.style.display = 'block';
                header.children[0].style.display = 'block';
                bg.style.display = 'none';
                modal.style.display = 'none';

            });


            title.addEventListener('mousedown', (ev) => {
                let oEvent = ev || event; //兼容性写法
                let x = oEvent.pageX - modal.offsetLeft; //获取鼠标在模态框内的坐标
                let y = oEvent.pageY - modal.offsetTop;

                function setPosttion(ev) {
                    modal.style.left = ev.pageX - x + 'px';
                    modal.style.top = ev.pageY - y + 'px';
                }
                //事件委托
                document.addEventListener('mousemove', setPosttion)
                document.addEventListener('mouseup', (ev) => {
                    // setPosttion(modal, ev, x, y)
                    document.removeEventListener('mousemove', setPosttion)
                        // document.removeEventListener('mouseup', move)
                })

            })

        })
    </script>
    <div class="login-header">
        <a href="javascript:;">点击，弹出登录框</a>
    </div>
    <div class="login">
        <div id="title" class="login-title">登录会员
            <span><a href="javascript:;" class="close-login">关闭</a></span>
        </div>
        <div class="login-input-content">
            <div class="login-input">
                <label for="">用户名：</label>
                <input type="text" placeholder="请输入用户名" name="info[password]" id="username" class="list-input">
            </div>
            <div class="login-input">
                <label for="">登录密码：</label>
                <input type="password" placeholder="请输入登录密码" name="info[password]" id="password" class="list-input">
            </div>

        </div>
        <div id="loginBtn" class="login-button"> <a href="javascript:;" id="login-button-submit"> 登录会员</a></div>
    </div>
    <!-- 遮盖层 -->
    <div class="login-bg" id="bg"></div>


</body>

</html>